# CVE-2026-7642: pskill9 website-downloader MCP index.ts download_website os command injection

> Remote attackers can execute arbitrary OS commands via the outputPath argument in the pskill9 website-downloader MCP interface.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 2 May 2026
- **Updated:** 5 May 2026
- **Also known as:** GHSA-xm3g-p4gq-33vr

## What is CVE-2026-7642?

CVE-2026-7642 is a medium-severity command injection vulnerability in pskill9 website-downloader, published on 2 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was detected in pskill9 website-downloader up to 0.1.0. This affects the function download_website of the file src/index.ts of the component MCP Interface. Performing a manipulation of the argument outputPath results in os command injection. The attack may be initiated remotely. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command), CWE-77 (Improper Neutralization of Special Elements used in a Command)

## Which versions are affected by CVE-2026-7642?


## How do I fix CVE-2026-7642?

No fix has been published for CVE-2026-7642 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-7642 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7642 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-7642 and fix it if it is affected.

What it is: CVE-2026-7642 is a medium-severity command injection vulnerability in pskill9 website-downloader, published on 2 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7642 exists.

Affected product: pskill9 website-downloader. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-7642/ (Markdown: https://insights.sbomify.com/CVE-2026-7642/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-7642
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-7642
- OSV: https://osv.dev/vulnerability/CVE-2026-7642

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-7642/
Summaries are generated and may contain mistakes; the official description above is the record.